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The chassis

A project log for R.Ian, simple and easy built robot for education

R.Ian is meant so be simple to build but have interesting capabilities useful for teaching programming

audrey-robinelAudrey Robinel 02/28/2016 at 20:220 Comments

As with R.Hasika, another of my robots, i decided to make a single piece chassis. This choice is justified by the simplicity requirement of the project. I want it to be as simple to assemble as possible. Such a chassis will also limit the parts count. However, that doesn't means that it's not upgradable. First of all, all the design files are open source, and can be modified freely. Second, the chassis have been designed in order to provide structural strength to the robot as well as securing some obligatory parts. However, many fixation points have also been added to the chassis to make it upgradable.

Here is a render of the chassis :

Note that there is also an open bottom version to save plastic if needs be. This one prints in less than 2 hours on my printrbot simple metal with no support nor any special tricks. It is meant to be easy printed. I printed it with around 10m of filament with 10% infill, out of the same PLA i used for the wheels. Here is what it looks like when printed :

A good surprise is that the gray PLA i have is not totally opaque. i'll see how well an RGB LED performs behind the thin walls.

Here is a top view of the chassis :

The two openings on the left are for the servomotors.The right side is the front, and is kept opened for contact sensors and IR/ultrasonic range measurements. With the holes in the front, a third servomotor (regular one in this case) can be mounted to allow a scanning motion for the distance sensor(s).

The chassis is quite light, with 32 grams.

The clear area in the middle is the place where the 18650 battery fits.

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